A grand collaboration between canned tuna and miso. The cheese makes it superb when it's freshly baked!
Zucchinis are cheap these days. During the summer, I make these zucchini boats quite frequently for my family. You could also use yellow zucchini!
If you add half of the cheese to the filling, it all sticks together and won't fall apart! You could also add canned mackerel.
Enjoy Japanese food around the world.